THIS IS THE WORST TRUE

My Account was debit for a loan installment- a day later it was made a late payment as the debit order was not received. i had to transfer the installment back to the loan account to insure no arrears. i called to find find out what the issue was and apparently it was a missing payment. the agent then informed me that the funds will be transferred back onto my Chq account, which happened, however once that funds was reversed back into my account- Double Purchased went off my account twice and a few purchases i made. i want the matter to be resolved ASAP. i do not intend waiting for the banks TAT. its SBSA to SBSA the bank needs to track back at all the double purchases that went out of my account and re-fund me. First my Loan installment was not allocated- leaving me in almost arrears then Purchases being doubled from my account what is next